lee/renderdoc
1
0
Fork 0
mirror of https://github.com/baldurk/renderdoc.git synced 2026-08-23 23:16:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

Apply thumbnail resampling fix to opengl.

Browse Source 
See CL fb4ec5c7e32905b4bc1c7a66a1074e1e8f8e59c8
for full description.
This commit is contained in:
akharlamov
2018-11-14 18:32:07 +00:00
committed by Baldur Karlsson
parent 6182c005b9
commit ee2cac1a74
1 changed files with 18 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files
renderdoc/driver/gl/gl_driver.cpp
+18 -28
View File
@@ -2190,41 +2190,31 @@ WrappedOpenGL::BackbufferImage *WrappedOpenGL::SaveBackbufferImage()
GL.glPixelStorei(eGL_PACK_ALIGNMENT, prevPackAlignment);
// scale down if necessary using simple point sampling
uint16_t resample_width = RDCMIN(maxSize, thwidth);
resample_width &= ~3; // JPEG encoder gives shear distortion if width is not divisible by 4.
if(thwidth != resample_width)
thwidth = RDCMIN(maxSize, uint16_t(dat.initParams.width));
// TODO(akharlamov): why does OpenGL align to 4 when Vulkan and DX11 align to 8?
thwidth &= ~0x3; // align down to multiple of 4
thheight = uint16_t(thwidth * dat.initParams.height / dat.initParams.width);
byte *src = thpixels;
byte *dst = thpixels = new byte[3U * thwidth * thheight];
for(uint32_t y = 0; y < thheight; y++)
{
float widthf = float(thwidth);
float heightf = float(thheight);
float aspect = widthf / heightf;
// clamp dimensions to a width of resample_width
thwidth = resample_width;
thheight = uint16_t(float(thwidth) / aspect);
byte *src = thpixels;
byte *dst = thpixels = new byte[3U * thwidth * thheight];
for(uint32_t y = 0; y < thheight; y++)
for(uint32_t x = 0; x < thwidth; x++)
{
for(uint32_t x = 0; x < thwidth; x++)
{
float xf = float(x) / float(thwidth);
float yf = float(y) / float(thheight);
uint32_t xSource = x * dat.initParams.width / thwidth;
uint32_t ySource = y * dat.initParams.height / thheight;
byte *pixelsrc =
&src[3 * uint32_t(xf * widthf) + dat.initParams.width * 3 * uint32_t(yf * heightf)];
byte *pixelsrc = &src[3 * xSource + dat.initParams.width * 3 * ySource];
memcpy(dst, pixelsrc, 3);
memcpy(dst, pixelsrc, 3);
dst += 3;
}
dst += 3;
}
// src is the raw unscaled pixels, which is no longer needed
SAFE_DELETE_ARRAY(src);
}
// src is the raw unscaled pixels, which is no longer needed
SAFE_DELETE_ARRAY(src);
}
byte *jpgbuf = NULL;